/*
 * This file Copyright (c) 2015. Walle.
 * (http://www.wallellen.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the
 * Walle Agreement (WA) and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or WA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Walle Agreement (WA), this file
 * and the accompanying materials are made available under the
 * terms of the WA which accompanies this distribution, and
 * is available at http://www.wallellen.com/agreement.html
 *
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 */

package com.wallellen.parameter.service.impl;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import java.util.Set;

/**
 * Created by walle on 12/12/15.
 */

@Service
public class PropertiesFileService {
    private static Set<ResourceBundle> constant = new HashSet();

    private static final Logger log = LoggerFactory.getLogger(PropertiesFileService.class);

    public static boolean registConstant(String fileName) {
        log.info("注册配置文件" + fileName + ".properties");
        return constant.add(ResourceBundle.getBundle(fileName));
    }

    public static List<Map.Entry<String, String>> getEntrys() {
        List list = new ArrayList();
        Enumeration enums;
        for (Iterator localIterator = constant.iterator(); localIterator.hasNext();
             enums.hasMoreElements()) {
            ResourceBundle node = (ResourceBundle) localIterator.next();
            enums = node.getKeys();
            //continue;
            String key = (String) enums.nextElement();
            Map.Entry entry = new AbstractMap.SimpleEntry(
                    key, node.getString(key));
            list.add(entry);
        }

        return list;
    }

    public static String getValue(String key) {
        for (ResourceBundle node : constant) {
            String value = getString(key, node);
            if (value != null) {
                return value;
            }
        }
        return null;
    }

    private static String getString(String key, ResourceBundle bundle) {
        try {
            return bundle.getString(key);
        } catch (MissingResourceException e) {
            log.error(key + " is missing ... ...");
        }
        return null;
    }
}